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Full-Text Articles in Veterinary Medicine
Determination Of Some Environmental Factors On Milk Yield Traits And Milk Components In Simmental Cows, Onur Şahi̇n, Mehmet İhsan Soysal, Eser Kemal Gürcan
Determination Of Some Environmental Factors On Milk Yield Traits And Milk Components In Simmental Cows, Onur Şahi̇n, Mehmet İhsan Soysal, Eser Kemal Gürcan
Turkish Journal of Veterinary & Animal Sciences
The aim of the study was to determine the effects of various environmental factors on milk yield and milk components in Simmental cows. In the present study, 33,813 milk yield records from 1631 cows and milk samples from 233 cows were used for milk component analysis. Lactation milk yield (LMY) and 305-day yield (305-DMY) were the milk yield characteristics studied. Environmental factors considered for milk yield characteristics included province, calving year, calving month, parity, age, and lactation length. Milk components analyzed were fat percentage (FP), protein percentage (PP), lactose percentage (LP), somatic cell count (Log10SCC), and dry matter (DM). Environmental …
Genotyping Of The Κ - Casein Gene By Pcr - Rflp (Acui Digestion) And Its Relationship To Milk Yield Traits In Anatolian Buffaloes, Murrah Buffaloes, And Their Crosses, Orhan Karadağ, Vasfi̇ye Kader Esen, Mehmet Aki̇f Yüksel, Mustafa Küçükkebabçi, Semi̇h Sevi̇m, İlkay Çeti̇n, Bi̇nnur Kaptan, Mehmet İhsan Soysal
Genotyping Of The Κ - Casein Gene By Pcr - Rflp (Acui Digestion) And Its Relationship To Milk Yield Traits In Anatolian Buffaloes, Murrah Buffaloes, And Their Crosses, Orhan Karadağ, Vasfi̇ye Kader Esen, Mehmet Aki̇f Yüksel, Mustafa Küçükkebabçi, Semi̇h Sevi̇m, İlkay Çeti̇n, Bi̇nnur Kaptan, Mehmet İhsan Soysal
Turkish Journal of Veterinary & Animal Sciences
The aim of this study was to investigate the polymorphism of the κ - casein gene (kappa casein, CSN3) in buffaloes and determine its effects on milk yield traits. Data were obtained from 2016 to 2019 from all animals in the ongoing Anatolian Buffalo Breeding Project. Genomic DNA was collected from a total of 209 buffaloes of different ages and sexes, namely 31 Murrah, 46 Anatolian buffaloes, and 132 of their crosses (Murrah × Anatolian). Genotyping of CSN3 gene by polymerase chain reaction-restriction fragment length polymorphism (PCR - RFLP) technique with restriction enzyme (AcuI) revealed three …
Estimation Of The Factors Affecting Lactation Milk Yield Of Holstein Cattle By The Adaptiveneuro-Fuzzy Inference System, Aycan Mutlu Yağanoğlu
Estimation Of The Factors Affecting Lactation Milk Yield Of Holstein Cattle By The Adaptiveneuro-Fuzzy Inference System, Aycan Mutlu Yağanoğlu
Turkish Journal of Veterinary & Animal Sciences
The aim of this study is to estimate lactation milk yield of Holstein cattle using first calving age, lactation period, and service period with (ANFIS) adaptive neuro-fuzzy inference system. The input variables for the system in the study were first calving age, lactation period, and service period. The output variable from the system was lactation milk yield. Predicted values obtained from the ANFIS were compared with the observed values. Twenty-seven rule functions are used to obtain the best model and 1000 epochs are used to estimate the accuracy of the training and testing error. The relations between the output and …
The Relation Of Fat Tissue Hormones And Some Galactopoietic Hormones With Milk Yield In Holstein And Simmental Cows, Zennure Demi̇r, Devri̇m Saripinar Aksu
The Relation Of Fat Tissue Hormones And Some Galactopoietic Hormones With Milk Yield In Holstein And Simmental Cows, Zennure Demi̇r, Devri̇m Saripinar Aksu
Turkish Journal of Veterinary & Animal Sciences
The present study was conducted to investigate the physiological changes in leptin, adiponectin, and ghrelin hormones, which are effective in the regulation of energy metabolism, and the galactopoietic hormones including growth hormone (GH), insulin, insulin-like growth factor-I (IGF-I), cortisol, thyroid stimulating hormone (TSH) and thyroxine (T4 ) levels, which are also effective in the regulation of metabolic activities and their correlation with milk yield levels in Holstein and Simmental cows with low, medium, and high milk yield. Holstein (n = 30) and Simmental cows (n = 30) with low, medium, and high milk yield were used. Cows were divided into …
The Relationship Of Leptin And Thyroid Hormones With Milk Yield And Some Fertilityparameters In Simmental Dairy Cows During Transition Period, Özkan Duru, Alparslan Kadi̇r Devri̇m, Hasan Ceyhun Macun, Si̇bel Yasa Duru, Ali̇ Şenol
The Relationship Of Leptin And Thyroid Hormones With Milk Yield And Some Fertilityparameters In Simmental Dairy Cows During Transition Period, Özkan Duru, Alparslan Kadi̇r Devri̇m, Hasan Ceyhun Macun, Si̇bel Yasa Duru, Ali̇ Şenol
Turkish Journal of Veterinary & Animal Sciences
In this study, transition period cows were used to test the hypothesis that serum levels of leptin and thyroid hormones would correlate the production efficiency such as milk yield, body condition score, and fertility in dairy cows raised under the same controlled conditions. The study comprised 37 Simmental cows, which were 3 years old and between 257-265 days of gestation. Serum levels of leptin, T3, T4, FT3, and FT4 hormones were measured in blood samples obtained from the animals, which were in the period of 3 weeks before and 3 weeks after delivery. Prepartum serum leptin levels were significantly (p < 0.05) lower in cows having increased milk production compared to the first lactation peak value. Also, postpartum serum FT3 levels were significantly (p < 0.05) lower in cows having milk yield of ≥ 30 kg. Leptin levels were found to be inversely related with milk production and fertility. FT3 levels exhibited a negative correlation with milk production and similarly T3 levels showed an inverse correlation with body condition score. The present study proposed that routine monitoring of leptin and thyroid hormones would be useful for the reproductive management of cows with breeding problems.
Effects Of Live Yeast On The Rumen Fermentation Parameters And Milk Performance Of Simmental Dairy Cows During The Hot Season, Habi̇p Muruz, Mehmet Gül
Effects Of Live Yeast On The Rumen Fermentation Parameters And Milk Performance Of Simmental Dairy Cows During The Hot Season, Habi̇p Muruz, Mehmet Gül
Turkish Journal of Veterinary & Animal Sciences
The effects of dietary supplementation with live yeast culture (LY) on the milk performance and rumen fermentation parameters of Simmental cows in the middle of lactation were examined under hot season conditions in 2019. The 28 cows, which were divided into two experimental groups of 14, were fed a controlled diet, with or without the addition of 5 g of LY per cow daily. The mean dry matter intake (DMI) and yield of milk in the LY group were greater by 0.25 kg/day and 0.42 kg/day, respectively, than for the control group. The yields of milk components and 4% fat …
The Effect Of Body Condition Score On Nutritional Diseases And Milk Yield In Dairy Cattle, Hasan Atalay
The Effect Of Body Condition Score On Nutritional Diseases And Milk Yield In Dairy Cattle, Hasan Atalay
Turkish Journal of Veterinary & Animal Sciences
The purpose of this study is to examine the effects of body condition score (BCS) on nutritional diseases and milk yield in dairy cattle. Fifty-nine randomly selected Holstein Friesian cattle, lactation numbers 3-6, were used in this study from a total of 350 dairy cattle in the establishment. All of the cows in the study were fed with the same total mixed ration (TMR), and BSC was determined by inspection and palpation in the first 5 days after calving. The cows were separated into two groups according to their BCS score as BCS ≤ 3 and BCS > 3, and Group …
Effect Of Utilization Of A Controlled-Release Intraruminal Monensin Device On Drymatter Intake, Milk Yield, And Some Reproductive Parameters In Dairy Cows, Seçki̇n Salar, Oğuz Çalişici, Duygu Çalişici, İdi̇l Baştan, Ayhan Baştan
Effect Of Utilization Of A Controlled-Release Intraruminal Monensin Device On Drymatter Intake, Milk Yield, And Some Reproductive Parameters In Dairy Cows, Seçki̇n Salar, Oğuz Çalişici, Duygu Çalişici, İdi̇l Baştan, Ayhan Baştan
Turkish Journal of Veterinary & Animal Sciences
The aim of this study was to examine the effect of the prepartal administration of the monensin release capsule on dry matter intake (DMI), milk yield, and some reproductive parameters of dairy cows. The cows were divided into study (n = 35) and control (n = 41) groups. The study group cows were administered the intraruminal-monensin releasing capsules at 21 $\pm$ 3 days before expected calving and the control group cows were not subjected to treatment. Monthly mean DMI; cumulative milk yield at 30, 45, and 60 days in milk (DIM); peak milk yield; days of 1st AI; days open; …
Effects Of Prepartum Treatment With Monensin Or Propylene Glycol Mixed With Concentrate On Milk Yield And Blood Nefa And Bhba Levels In Dairy Cows, Zafer Meci̇toğlu, Sevi̇m Kasap, Mehmet Levent Özdüven, Muhi̇tti̇n Özder, Engi̇n Kennerman
Effects Of Prepartum Treatment With Monensin Or Propylene Glycol Mixed With Concentrate On Milk Yield And Blood Nefa And Bhba Levels In Dairy Cows, Zafer Meci̇toğlu, Sevi̇m Kasap, Mehmet Levent Özdüven, Muhi̇tti̇n Özder, Engi̇n Kennerman
Turkish Journal of Veterinary & Animal Sciences
Sixty multiparous Holstein-Friesian dairy cows made up the study sample. Group M (n = 20) received 300 mg/day monensin (Kexxtone, Elanco) for 21 days prior to the expected calving date. Group PGC (n = 20) received propylene glycol, mixed with concentrate and fed separately from total mixed ration (TMR) twice a day in the last 21 days of gestation. The control group, Group C (n = 20) did not receive any treatment prior to parturition. Cows in all three groups received PG (300 mL/day) for 5 days after parturition. Blood samples were collected 21 and 7 days prior to the …
Investigation Of The Promoter Polymorphisms Of The Growth Hormone (Gh1), Growth Hormone Receptor (Ghr), Insulin-Like Growth Factor (Igf-I), And Prolactin (Prl) Genes And The Correlation Between Gene Expression And Milk Yields In Holstein Cattle Raised In Central Anatolia, Korhan Arslan, Serpi̇l Taheri̇, Eli̇f Funda Şener, Bi̇lal Akyüz, Aytaç Akçay, Yusuf Özkul, Kaan Muhsi̇n İşcan
Investigation Of The Promoter Polymorphisms Of The Growth Hormone (Gh1), Growth Hormone Receptor (Ghr), Insulin-Like Growth Factor (Igf-I), And Prolactin (Prl) Genes And The Correlation Between Gene Expression And Milk Yields In Holstein Cattle Raised In Central Anatolia, Korhan Arslan, Serpi̇l Taheri̇, Eli̇f Funda Şener, Bi̇lal Akyüz, Aytaç Akçay, Yusuf Özkul, Kaan Muhsi̇n İşcan
Turkish Journal of Veterinary & Animal Sciences
The aim of this study was to investigate the promoter polymorphisms of the growth hormone (GH1), growth hormone receptor (GHR), insulin-like growth factor (IGF-I), and prolactin (PRL) genes, and the correlation of the expression levels of these genes with lactation and daily milk yields in Holstein cattle. A total of 154 lactating Holstein cows raised in the Central Anatolia Region of Turkey, with a mean age of 5.4 years and a mean body weight of 571.7 kg, constituted the study material. Each blood sample was examined by real-time PCR for mRNA expression levels and the promoter polymorphisms of the GH1, …
Milk Composition And Yield Changes With Advancing Pregnancy In Dairy Buffaloes (Bubalus Bubalis), Sarzamin Khan, Muhammad Subhan Qureshi, Ifthiar Ahmed, Syed Mirajullah Shah
Milk Composition And Yield Changes With Advancing Pregnancy In Dairy Buffaloes (Bubalus Bubalis), Sarzamin Khan, Muhammad Subhan Qureshi, Ifthiar Ahmed, Syed Mirajullah Shah
Turkish Journal of Veterinary & Animal Sciences
The changes in the composition of milk with advancing pregnancy were investigated in Nili-Ravi dairy buffaloes. Forty lactating buffaloes were used, within 2-3 months postpartum. The animals were grouped as high, moderate, and low yielders; synchronized for estrus; and inseminated artificially. Milk yield was recorded daily and sampled fortnightly for analysis. The data were analyzed using the univariate weighted mean and general linear model. Decline in milk yield became significant after the 8th week post-conception. The high yielders had the lowest fat contents. Milk fat increased significantly during succeeding weeks post-conception. The highest fat level (8.5%) was observed in week …
Monitoring Of Somatic Cell Count Variations During Lactation In Primiparous And Multiparous Turkish Saanen Goats (Capra Hircus), Abdülkadi̇r Orman, Ayteki̇n Günay, Faruk Balci, Mehmet Koyuncu
Monitoring Of Somatic Cell Count Variations During Lactation In Primiparous And Multiparous Turkish Saanen Goats (Capra Hircus), Abdülkadi̇r Orman, Ayteki̇n Günay, Faruk Balci, Mehmet Koyuncu
Turkish Journal of Veterinary & Animal Sciences
In this study, a total of 28 Saanen does were used to evaluate the relationship between somatic cell count (SCC) and milk yield. The study included 14 first-lactation (primiparous) does and 14 does in second lactation or greater (multiparous). Individual milk samples from both morning and evening milkings were taken every 15 days throughout the lactation period of 7 months. While somatic cell counts were higher during the evening milking (840.40 versus 532.30 cells mL-1; 1050.40 versus 759.70 cells mL-1), milk yields were lower during the evening milking (115.40 versus 193.80 kg; 177.40 versus 280.00 kg) for both primiparous and …
Interaction Between Particle Sizes Of Alfalfa Hay And Corn Grain On Milk Yield, Milk Composition, Chewing Activity, And Ruminal Ph Of Dairy Cows, Mehmet Ali̇ Bal, E. Banu Büyükünal Bal
Interaction Between Particle Sizes Of Alfalfa Hay And Corn Grain On Milk Yield, Milk Composition, Chewing Activity, And Ruminal Ph Of Dairy Cows, Mehmet Ali̇ Bal, E. Banu Büyükünal Bal
Turkish Journal of Veterinary & Animal Sciences
The objective of this study was to determine the interactions between alfalfa hay and corn grain particle sizes on nutrient intake, milk yield, milk composition, chewing activity, and ruminal pH of dairy cows. Alfalfa hay was chopped either at 4 cm (long; L) or 1 cm (short; S) theoretical length of cut. Particle size of corn grain was obtained by grinding either at 1 mm (coarse; C) or less than 1 mm (fine; F) mean particle size. Four lactating multiparous Holstein cows were assigned in a 4×4 Latin Square design in a 2×2 factorial arrangement of treatments with 21-day periods. …
Calculation Of Adjustment Factors For Standardizing Lactations To Mature Age And 305-Day And Estimation Of Heritability And Repeatability Of Standardized Milk Yield Of Simmental Cattle Reared On Kazova State Farm, Süleyman Çi̇lek, Mehmet Emi̇n Teki̇n
Calculation Of Adjustment Factors For Standardizing Lactations To Mature Age And 305-Day And Estimation Of Heritability And Repeatability Of Standardized Milk Yield Of Simmental Cattle Reared On Kazova State Farm, Süleyman Çi̇lek, Mehmet Emi̇n Teki̇n
Turkish Journal of Veterinary & Animal Sciences
Adjustment factors of lactation milk yield to mature age and 305-day were calculated and heritability and repeatability of milk yield were estimated for Simmental cows reared on Kazova State Farm. A total of 1549 lactation records of Simmental cows reared on Kazova State Farm between 1992 and 2002 were used. The factors for standardizing incomplete lactations to 305-day were estimated by taking 7 calving age groups into consideration (2, 3, 4, 5, 6-8, 9 and 10 years of age and older). The factors for standardizing to mature equivalent estimated by polynomial regression are between the 24^th and 143^rd month and …
Relationships Between Milk Yield And Udder Measurements In Brown Swiss Cows, Muammer Ti̇lki̇, Şeref İnal, Mehmet Çolak, Mustafa Gari̇p
Relationships Between Milk Yield And Udder Measurements In Brown Swiss Cows, Muammer Ti̇lki̇, Şeref İnal, Mehmet Çolak, Mustafa Gari̇p
Turkish Journal of Veterinary & Animal Sciences
The effects of udder and teat measurements on milk yield in Brown Swiss Cows were studied. The differences among the means for front and rear teat length, front and rear teat diameter, front and rear udder height, distance between front teats and mammary type scores in different lactation numbers were statistically significant (P < 0.001). Front and rear teat length, and front and rear udder height after milking were higher than before milking. Front and rear teat diameter, distance between front teats, distance between rear teats and distance between front and rear teats after milking were lower than before milking. Furthermore, 305-day milk yield and milk yield per milking were significantly positively correlated with distance between front and rear teats and mammary type scores before milking (P < 0.001). The mean values before milking for front and rear teat length, front and rear teat diameter, front and rear teat udder height, distance between front teats, distance between rear teats, distance between front and rear teats and mammary type scores at general lactation were 59.45 and 49.72 mm, 22.14 and 21.53 mm, 47.96 and 47.59 cm, 12.29 cm, 7.76 cm, 9.58 cm and 23.65, respectively. In conclusion, teat and udder measurements and mammary type scores significantly affected milk yield.
Altering The Lactation Cycle: Is A 60-Day Dry Period Too Long?, Mehmet Şükrü Gülay
Altering The Lactation Cycle: Is A 60-Day Dry Period Too Long?, Mehmet Şükrü Gülay
Turkish Journal of Veterinary & Animal Sciences
The most critical problem for the evaluation of different dry period lengths is the relationship between days dry and subsequent milk production. It is assumed that when a cow is dried off, the loss in the current lactation will be compensated for by greater milk production during the following lactation. However, the process of parturition and initiation of lactation are extremely important events and they are associated with many problems that may result in removal of the individual cow from the herd or in greatly reduced milk production, especially early in the lactation. Therefore, identification of the shortest possible dry …
Effects Of Teat Shape On Milk Yield And Milking Traits In Brown Swiss Cows, Muammer Ti̇lki̇, Mehmet Çolak, Şeref İnal, Tamer Çağlayan
Effects Of Teat Shape On Milk Yield And Milking Traits In Brown Swiss Cows, Muammer Ti̇lki̇, Mehmet Çolak, Şeref İnal, Tamer Çağlayan
Turkish Journal of Veterinary & Animal Sciences
Effects of teat measurement and teat shape on milking time, milk flow rate and milk yield in Brown Swiss cows were evaluated. The means of 305-day milk yield for cylindrical, funnel and bottle teat shape groups were 3156, 3169 and 2377 kg, respectively. The mean values for the milking time in 1^{st}2^{nd} and 3^{rd} milk yield groups were 6.54, 6.56 and 6.20 min and the differences were not statistically significant. Length and diameter of front and rear teats were negatively correlated with milk flow rate. Milk flow rate showed significant correlations with 305-day milk yield and milk yield per milking …
Environmental Factors Affecting Milk Yield And Fertility Traits Of Simmental Cows Raised At The Kazova State Farm And Phenotypic Correlations Between These Traits, Süleyman Çi̇lek, Mehmet Emi̇n Teki̇n
Environmental Factors Affecting Milk Yield And Fertility Traits Of Simmental Cows Raised At The Kazova State Farm And Phenotypic Correlations Between These Traits, Süleyman Çi̇lek, Mehmet Emi̇n Teki̇n
Turkish Journal of Veterinary & Animal Sciences
The aim of this study was to investigate environmental factors affecting milk yield and fertility traits of Simmental cows raised at the Kazova state farm and the phenotypic correlation between these traits from 1473 records between 1992 and 2001. The least square means of 305-days milk yield, lactation duration, dry period, service period, calving interval, gestation length and number of inseminations per conception (NIPC) were 4700 kg, 300 days, 81 days, 94 days, 379 days, 283.6 days and 1.76, respectively. The effect of calving year on milk yield and fertility traits was statistically significant (P < 0.001). The effect of calving age on gestation length and milk yield was also statistically significant (P < 0.001-P < 0.05). The effect of calving season on gestation length, 305-days milk yield and NIPC was also statistically significant (P < 0.001-P < 0.05). Birth type did not significantly affect any traits, except for gestation length. The phenotypic correlations between 305-days milk yield and lactation duration (0.39), between NIPC and service period (0.81), between NIPC and calving interval (0.77), between calving interval and service period (0.96) and between calving interval and gestation length (0.12) were statistically significant (P < 0.001). Correlations between milk yield and fertility traits (0.09-0.77) were statistically significant (P < 0.001-P < 0.05), except for gestation length. These results are acceptable and it can be concluded that Simmental cattle are raised successfully on this farm and under Turkish conditions.
Estimation Of Genetic Parameters And Correlations For The First Three Lactation Milk Yields In Holstein Friesian Cattle By The Reml Method, Adnan Ünalan, Zeynel Cebeci̇
Estimation Of Genetic Parameters And Correlations For The First Three Lactation Milk Yields In Holstein Friesian Cattle By The Reml Method, Adnan Ünalan, Zeynel Cebeci̇
Turkish Journal of Veterinary & Animal Sciences
In this study, 3484 milk yield records (1520 first, 1206 second and 758 third lactations) obtained from 1816 cows born between 1990 and 1997 in the Holstein-Friesian herd of Ceylanpınar State Farm were used to estimate the heritabilities, and genetic and phenotypic correlations between lactation milk yields using an individual animal model and the restricted maximum likelihood (REML) method. In the model studied, 305-day milk yields were used and individual animal effects were assumed to be a random effect, calving year and calving months were fixed effects, and calving age (as months) was a covariate, and all of these factors …
Milk Yield Characteristics Of Karakaş Sheep, Orhan Karaca, Nurhan Akyüz, Seval Andi̇ç, Tufan Altin
Milk Yield Characteristics Of Karakaş Sheep, Orhan Karaca, Nurhan Akyüz, Seval Andi̇ç, Tufan Altin
Turkish Journal of Veterinary & Animal Sciences
Milk yield and composition were determined in a total of 85 Karakaş ewes (Akkaraman breed). The data were collected from Yüzüncü Yıl University, Agriculture Faculty's Practice Farm and a rural farm near the University. Lactation length, average daily milk yield and total milk yield were 155.9 ± 4.3 days, 529.6 ± 31.6 ml and 84.7 ± 5.1 l, respectively. Milk fat, total solid and mineral percentages were 7.09 ± 0.25%, 19.75 ± 0.66% and 0.93 ± 0.03%, respectively. The differences between farms were significant (P < 0.05 and P < 0.01) for lactation length, average daily milk yield, total milk yield and milk fat percentage. The milk yields of ewes reared in rural farms were lower. In addition, the correlations between a number of characteristics were significant (P < 0.05 and P < 0.01).
Effect Of Some Environmental Factors On Milk Yield Traits In A Brown Swiss Herd Reared At The Bahri Dağdaş International Agricultural Research Institute, Muammer Ti̇lki̇, Şeref İnal, Mehmet Çolak, M. Emi̇n Teki̇n
Effect Of Some Environmental Factors On Milk Yield Traits In A Brown Swiss Herd Reared At The Bahri Dağdaş International Agricultural Research Institute, Muammer Ti̇lki̇, Şeref İnal, Mehmet Çolak, M. Emi̇n Teki̇n
Turkish Journal of Veterinary & Animal Sciences
This study was carried out to investigate milk yield traits and some environmental factors affecting milk yield traits in Brown Swiss cattle reared at the Bahri Dağdaş International Agricultural Research Institute. Between 1987 and 1998, 730 lactation records obtained from 273 cows were evaluated. The least-squares means of measured milk yield, 305-day milk yield, dry period and lactation duration were 3631 kg, 3332 kg, 97.1 days and 313.8 days, respectively. Both year and age statistically affected (P < 0.01-0.001) milk yield and lactation duration, but the calving season was not affected (P > 0.05). The effect of the year on dry period was also significant (P < 0.01), but the effect of age and calving season were not significant (P > 0.05).
The Level Of Inbreeding And Its Effects On Milk Yield, Age At First Calving And Calf Mortality In Holstein Cattle Reared On The Agricultural Faculty Farm Of Ege University, Can Uzmay, Yavuz Akbaş
The Level Of Inbreeding And Its Effects On Milk Yield, Age At First Calving And Calf Mortality In Holstein Cattle Reared On The Agricultural Faculty Farm Of Ege University, Can Uzmay, Yavuz Akbaş
Turkish Journal of Veterinary & Animal Sciences
In this study, the inbreeding coefficient of 1535 Holstein calves born on the Agricultural Faculty farm of Ege University during the period 1980-2000 was calculated, and the change of inbreeding levels over the years was investigated. Furthermore, the effects of inbreeding on first lactation 305-day milk yield, age at first calving and calf mortality were examined. The mean inbreeding level of calves born in the investigated period was 1.89%. The level of inbreeding in the herd fluctuated from 0% to 4.37% according to the birth years of calves. Furthermore, over the last 3 years of the period (1998-2000) inbreeding steadily …
An Investigation On Milk Yield And Reproductive Performance Of Holstein Friesian Cows In Kocas State Farm 1. Milk Yield Traits, Serdar Duru, Erdoğan Tuncel
An Investigation On Milk Yield And Reproductive Performance Of Holstein Friesian Cows In Kocas State Farm 1. Milk Yield Traits, Serdar Duru, Erdoğan Tuncel
Turkish Journal of Veterinary & Animal Sciences
This research was conducted to determine the characteristics of milk yield of Holstein Friesian cows raised at Kocas state farm in Central Anatolia. The material of the research was 970 lactation records of 362 dairy cows raised from 1988 to 1995 at Kocas state farm. Statistical analysis of the records was conducted with the Minitab version 9.2 computer program. Significant differences between groups were determined by the method of Least Significant Difference (LSD). The general mean values of lactation length, lactation milk yield and 305 day milk yield were respectively 304.4±1.39 days, 4966±32.96 kg and 4784± 27.35.
Some Genetic Parameters Of Milk Production In The Holstein Breed, Okan Ertuğrul, Mehmet Nurullah Orman, Güven Güneren
Some Genetic Parameters Of Milk Production In The Holstein Breed, Okan Ertuğrul, Mehmet Nurullah Orman, Güven Güneren
Turkish Journal of Veterinary & Animal Sciences
This study was carried out to estimate the heritabilities and the genetic and phenotypic correlations between some milk production traits in Holstein cows in Ceylanpınar State Farm. A mixed-model equation was used in the study. The heritabilities and the genetic correlations were estimated by the Restricted Maximum Likelihood method (REML) for all the variables. Phenotypic correlations were estimated from measurements of the traits. Paternal half-sib correlations were used for the estimation of the heritability values. The heritabilities for the 2x305ME milk yield, the lactation length, the length of the dry period, and the calving interval were estimated to be 0.169±0.0287, …
Studies On The Effect Of Bovine Somatotropin Hormone (Rbst)On Milk Yield, Milk Composition And Health Of Dairy Cows, İsmai̇l Abaş, Haydar Özpinar
Studies On The Effect Of Bovine Somatotropin Hormone (Rbst)On Milk Yield, Milk Composition And Health Of Dairy Cows, İsmai̇l Abaş, Haydar Özpinar
Turkish Journal of Veterinary & Animal Sciences
The aim of this study was to investigate the influence of growth hormone (rbST)on milk yield, milk composition, animal health and sera concentration of glucose, GOT, GPT, insulin, free fat acids and blood urea of Holstein dairy cows. In this study,20 primiparous Holstein dairy cows were treated with rbST or placebo (control)in weeks 10-18 and 20-28 of lactation. In the first treatment period, the ten cows of the treatment Group A were administrated 500 mg methionyl bovine growth hormone, and the other ten cows (Group B)the same quantity of placebo.The treatment with growth hormone or placebo was switched over in …
Comparative Studies On The Production Performances Of Chios And Imroz Breeds Kept Under Semi-Intensive Conditionus Ii. Milk Production, Fleece Yields And Characteristics, Şebnem Gündal Çörekçi̇, Mehmet Evri̇m
Comparative Studies On The Production Performances Of Chios And Imroz Breeds Kept Under Semi-Intensive Conditionus Ii. Milk Production, Fleece Yields And Characteristics, Şebnem Gündal Çörekçi̇, Mehmet Evri̇m
Turkish Journal of Veterinary & Animal Sciences
This paper is the second part of a study carried out to reveal the comparative production performances and effect of some environmental factors on the production characteristics of Chios and Imroz ewes kept in a single flock under semi-intensive conditions. In this part of the study milk yields, lactation lengths and fleece weights and characteristics were considered. Mean lactation lengths and milk yield of Chios ewes were 203 days and 73.92 kg respectively; the comparative values for Imroz ewes were 223 days and 102.04 kg respectively. At the first shearing (6 months of age), average fleece weights of Chios and …
Estimation Of Heritability Of Milk Yield Through Analysis Of Variance In A Repeated Measures Design In Holsteins, İsmet Doğan, Mahi̇ye Özçeli̇k, Nurhan Doğan
Estimation Of Heritability Of Milk Yield Through Analysis Of Variance In A Repeated Measures Design In Holsteins, İsmet Doğan, Mahi̇ye Özçeli̇k, Nurhan Doğan
Turkish Journal of Veterinary & Animal Sciences
In this study, data relating to the milk yield of a Holstein herd on Bala State Farm was analysed for the period 1985-92. The aim of this study was to estimate the heritability of the milk yield using two-factor experiments with repeated measures on one factor. The heritability of the milk yield was estimated to be 0.36.
The Genetic And Phenotypic Correlations Between Milk And Reproductive Traits In Holstein Cows, Mahi̇ye Özçeli̇k, İsmet Doğan
The Genetic And Phenotypic Correlations Between Milk And Reproductive Traits In Holstein Cows, Mahi̇ye Özçeli̇k, İsmet Doğan
Turkish Journal of Veterinary & Animal Sciences
In this study, the genetic and phenotypic correlations between milk production traits (milk yield, lactation duration, dry period) and reproductive traits (the number of inseminations per conception, service period, calving interval and gestation period) in Holstein Cows were investigated. The data relating to milk and reproductive traits in the period of 1985-1992 of a Holstein herd at the Bala State Farm was used. The genetic correlations were generally higher than phenotypic correlations between traits investigated in this study. In milk production traits, the phenotypic correlations between the milk yield and the lactation duration (0.41) and the dry period (-0.14) were …